It depends on your reading level, but if you can read adult level novels, then some of the modern classics that are on school reading lists (so every student has at least heard of them, if not read them) might be for you.
Animal Farm
Brave New World
The Grapes of Wrath
The Heart Is A Lonely Hunter
The Great Gatsby
The Lion, the Witch and the Wardrobe (a series for young adults)
Sherlock Holmes' Casebook / The Sign of Four
The Lord of the Flies
and anything by Agatha Christie
Modern Classics on the UK national school reading lists are...
Paddy Clark hahaha
About A Boy
Never Let Me Go